MS SQL Server :: Error On Backup Scan With Nolock

Could Not Continue Scan With NOLOCK Due To Data Movement

Aug 24, 2007

Hi all,

I'm getting this error on expanding the Databases node in SQL Server Management Studio Express Object Explorer:

Failed to retrieve data for this request. (Microsoft.SqlServer.Express.SmoEnum)
An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.Express.ConnectionInfo)
Could not continue scan with NOLOCK due to data movement. (Microsoft SQL Server, Error: 601)

A similar error message also appeared when I tried opening an existing data connection within Database Explorer in Visual Web Developer Express. (However, the web application ran fine and it managed to access the database normally.)

These errors only appeared recently. Any ideas how to go about solving this issue?

Thanks in advance.

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Fails With: Could Not Continue Scan With NOLOCK Due To Data Movement

Mar 20, 2008

We have a stored procedure that failed with: Could not continue scan with NOLOCK due to data movement

We are running with ISOLATION LEVEL READ UNCOMMITTED. There are other jobs running, some of which might be hitting these tables (all using the ROWLOCK hint - though I know that's not guaranteed), however, this stored proc would not be going near the same rows. But even if they were, we'd be happy with either the before-look or after-look. This needs to be a low-impact job and should have minimal impact on ther other jobs, so we can't take out locks. Is there any hint we can use to do this? e.g. can we tell the query to just wait until the data has stopped moving then try again?

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Jan 29, 2006

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An Error Occurred In The Service Broker Internal Activator While Trying To Scan The User Queue '(null)' For Its Status. Error: 2

Apr 25, 2007

Hello - can't find any info on this error - can anyone shed some light?

There was a deadlock - which preceeded this message by 2 seconds.

04/25/2007 08:20:12,spid108,Unknown,An error occurred in the Service Broker internal activator while trying to scan the user queue '(null)' for its status. Error: 2905<c/> State: 1.
04/25/2007 08:20:12,spid108,Unknown,External dump process return code 0x20000001.<nl/>External dump process returned no errors.
04/25/2007 08:20:12,spid108,Unknown,Stack Signature for the dump is 0x1229B5AA
04/25/2007 08:20:12,spid108,Unknown,78132A36 Module(MSVCR80+00002A36)
04/25/2007 08:20:12,spid108,Unknown,781329AA Module(MSVCR80+000029AA)
04/25/2007 08:20:12,spid108,Unknown,01447720 Module(sqlservr+00447720)
04/25/2007 08:20:12,spid108,Unknown,0144789A Module(sqlservr+0044789A)
04/25/2007 08:20:12,spid108,Unknown,0144859B Module(sqlservr+0044859B)
04/25/2007 08:20:12,spid108,Unknown,01447562 Module(sqlservr+00447562)
04/25/2007 08:20:12,spid108,Unknown,01006DAB Module(sqlservr+00006DAB)
04/25/2007 08:20:12,spid108,Unknown,01006BBC Module(sqlservr+00006BBC)
04/25/2007 08:20:12,spid108,Unknown,01006A96 Module(sqlservr+00006A96)
04/25/2007 08:20:12,spid108,Unknown,0112F65C Module(sqlservr+0012F65C)
04/25/2007 08:20:12,spid108,Unknown,0112F70F Module(sqlservr+0012F70F)
04/25/2007 08:20:12,spid108,Unknown,0112CB04 Module(sqlservr+0012CB04)
04/25/2007 08:20:12,spid108,Unknown,0112D1D1 Module(sqlservr+0012D1D1)
04/25/2007 08:20:12,spid108,Unknown,0112EA61 Module(sqlservr+0012EA61)
04/25/2007 08:20:12,spid108,Unknown,0108A5CB Module(sqlservr+0008A5CB)
04/25/2007 08:20:12,spid108,Unknown,0108A56B Module(sqlservr+0008A56B)
04/25/2007 08:20:12,spid108,Unknown,01060A5A Module(sqlservr+00060A5A)
04/25/2007 08:20:12,spid108,Unknown,01476CB2 Module(sqlservr+00476CB2)
04/25/2007 08:20:12,spid108,Unknown,01476FD3 Module(sqlservr+00476FD3)
04/25/2007 08:20:12,spid108,Unknown,017FA720 Module(sqlservr+007FA720)
04/25/2007 08:20:12,spid108,Unknown,017FAADC Module(sqlservr+007FAADC)
04/25/2007 08:20:12,spid108,Unknown,01796B1B Module(sqlservr+00796B1B)
04/25/2007 08:20:12,spid108,Unknown,01793310 Module(sqlservr+00793310)
04/25/2007 08:20:12,spid108,Unknown,0179438B Module(sqlservr+0079438B)
04/25/2007 08:20:12,spid108,Unknown,* Short Stack Dump
04/25/2007 08:20:12,spid108,Unknown,* -------------------------------------------------------------------------------
04/25/2007 08:20:12,spid108,Unknown,* *******************************************************************************
04/25/2007 08:20:12,spid108,Unknown,* SegSs: 00000023:
04/25/2007 08:20:12,spid108,Unknown,* Esp: 1302E584: 13025387 80C87378 80C872F0 00000000 78140001 0009D9C2
04/25/2007 08:20:12,spid108,Unknown,* EFlags: 00010202: 00610067 00650074 0049003B 0076006E 006C0061 00640069
04/25/2007 08:20:12,spid108,Unknown,* SegCs: 0000001B:
04/25/2007 08:20:12,spid108,Unknown,* Ebp: 1302F67C: 1302F788 01793310 13025373 80C872F0 7093AB12 801E8B38
04/25/2007 08:20:12,spid108,Unknown,* Eip: 0179438B: 828B118B 000000E0 C085D0FF 00B9850F 9D890000 FFFFEF8C
04/25/2007 08:20:12,spid108,Unknown,* Edx: 00000E38:
04/25/2007 08:20:12,spid108,Unknown,* Ecx: 00000000:
04/25/2007 08:20:12,spid108,Unknown,* Ebx: 00000000:
04/25/2007 08:20:12,spid108,Unknown,* Eax: A99EE598: 00000000 00000000 A99EE5B0 00000000 00000000 00000000
04/25/2007 08:20:12,spid108,Unknown,* Esi: 00000000:
04/25/2007 08:20:12,spid108,Unknown,* Edi: 80C872F0: 7093AB12 80C87FF0 00000007 B8A20008 7093AB15 00000000
04/25/2007 08:20:12,spid108,Unknown,*
04/25/2007 08:20:12,spid108,Unknown,* dbghelp 14200000 14312FFF 00113000
04/25/2007 08:20:12,spid108,Unknown,* sqlevn70 76780000 76913FFF 00194000
04/25/2007 08:20:12,spid108,Unknown,* sqlevn70 764A0000 76633FFF 00194000
04/25/2007 08:20:12,spid108,Unknown,* sqlevn70 76300000 76493FFF 00194000
04/25/2007 08:20:12,spid108,Unknown,* sqlevn70 341D0000 343AFFFF 001e0000
04/25/2007 08:20:12,spid108,Unknown,* sqlevn70 33590000 33764FFF 001d5000
04/25/2007 08:20:12,spid108,Unknown,* sqlevn70 333F0000 33583FFF 00194000
04/25/2007 08:20:12,spid108,Unknown,* sqlevn70 14490000 1467AFFF 001eb000
04/25/2007 08:20:12,spid108,Unknown,* sqlevn70 13D10000 13EFBFFF 001ec000
04/25/2007 08:20:12,spid108,Unknown,* OLEDB32R 13770000 13780FFF 00011000
04/25/2007 08:20:12,spid108,Unknown,* MSDART 133D0000 133E9FFF 0001a000
04/25/2007 08:20:12,spid108,Unknown,* oledb32 13350000 133C8FFF 00079000
04/25/2007 08:20:12,spid108,Unknown,* msxml3 11BD0000 11CE1FFF 00112000
04/25/2007 08:20:12,spid108,Unknown,* msxmlsql 11AF0000 11BC5FFF 000d6000
04/25/2007 08:20:12,spid108,Unknown,* System.Xml 10FA0000 11193FFF 001f4000
04/25/2007 08:20:12,spid108,Unknown,* System.Security 10F20000 10F61FFF 00042000
04/25/2007 08:20:12,spid108,Unknown,* System 10C10000 10EF3FFF 002e4000
04/25/2007 08:20:12,spid108,Unknown,* System.Security.ni 10A90000 10B45FFF 000b6000
04/25/2007 08:20:12,spid108,Unknown,* System.Transactions 0FAD0000 0FB12FFF 00043000
04/25/2007 08:20:12,spid108,Unknown,* System.ni 7A440000 7ABFDFFF 007be000
04/25/2007 08:20:12,spid108,Unknown,* System.Data 102D0000 10596FFF 002c7000
04/25/2007 08:20:12,spid108,Unknown,* mscorjit 0F910000 0F962FFF 00053000
04/25/2007 08:20:12,spid108,Unknown,* SqlAccess 0F8A0000 0F8F5FFF 00056000
04/25/2007 08:20:12,spid108,Unknown,* SensApi 0F880000 0F884FFF 00005000
04/25/2007 08:20:12,spid108,Unknown,* cryptnet 0F680000 0F691FFF 00012000
04/25/2007 08:20:12,spid108,Unknown,* SOFTPUB 0F670000 0F674FFF 00005000
04/25/2007 08:20:12,spid108,Unknown,* mscorsec 0F640000 0F652FFF 00013000
04/25/2007 08:20:12,spid108,Unknown,* mscorlib.ni 0EAC0000 0F5A7FFF 00ae8000
04/25/2007 08:20:12,spid108,Unknown,* mscorwks 080E0000 08640FFF 00561000
04/25/2007 08:20:12,spid108,Unknown,* xplog70 07CA0000 07CA2FFF 00003000
04/25/2007 08:20:12,spid108,Unknown,* xplog70 07C80000 07C8BFFF 0000c000
04/25/2007 08:20:12,spid108,Unknown,* xpstar90 07C50000 07C75FFF 00026000
04/25/2007 08:20:12,spid108,Unknown,* odbcint 07C30000 07C46FFF 00017000
04/25/2007 08:20:12,spid108,Unknown,* ATL80 7C630000 7C64AFFF 0001b000
04/25/2007 08:20:12,spid108,Unknown,* BatchParser90 07A40000 07A5EFFF 0001f000
04/25/2007 08:20:12,spid108,Unknown,* ODBC32 07A00000 07A3CFFF 0003d000
04/25/2007 08:20:12,spid108,Unknown,* SQLSCM90 079E0000 079E8FFF 00009000
04/25/2007 08:20:12,spid108,Unknown,* xpstar90 07980000 079C7FFF 00048000
04/25/2007 08:20:12,spid108,Unknown,* xpsqlbot 07960000 07965FFF 00006000
04/25/2007 08:20:12,spid108,Unknown,* msftepxy 07490000 074A4FFF 00015000
04/25/2007 08:20:12,spid108,Unknown,* SQLNCLIR 007A0000 007D2FFF 00033000
04/25/2007 08:20:12,spid108,Unknown,* comdlg32 762B0000 762F9FFF 0004a000
04/25/2007 08:20:12,spid108,Unknown,* COMCTL32 77530000 775C6FFF 00097000
04/25/2007 08:20:12,spid108,Unknown,* sqlncli 337A0000 339C1FFF 00222000
04/25/2007 08:20:12,spid108,Unknown,* CLBCatQ 777B0000 77832FFF 00083000
04/25/2007 08:20:12,spid108,Unknown,* xpsp2res 10000000 102C4FFF 002c5000
04/25/2007 08:20:12,spid108,Unknown,* ntdsapi 766F0000 76704FFF 00015000
04/25/2007 08:20:12,spid108,Unknown,* wshtcpip 070B0000 070B7FFF 00008000
04/25/2007 08:20:12,spid108,Unknown,* hnetcfg 071F0000 07248FFF 00059000
04/25/2007 08:20:12,spid108,Unknown,* dssenh 070C0000 070E3FFF 00024000
04/25/2007 08:20:12,spid108,Unknown,* imagehlp 76C10000 76C38FFF 00029000
04/25/2007 08:20:12,spid108,Unknown,* WINTRUST 76BB0000 76BDAFFF 0002b000
04/25/2007 08:20:12,spid108,Unknown,* dbghelp 06C10000 06D22FFF 00113000
04/25/2007 08:20:12,spid108,Unknown,* msfte 069B0000 06C08FFF 00259000
04/25/2007 08:20:12,spid108,Unknown,* security 06190000 06193FFF 00004000
04/25/2007 08:20:12,spid108,Unknown,* rasadhlp 76F80000 76F84FFF 00005000
04/25/2007 08:20:12,spid108,Unknown,* winrnr 76F70000 76F76FFF 00007000
04/25/2007 08:20:12,spid108,Unknown,* DNSAPI 76ED0000 76EF8FFF 00029000
04/25/2007 08:20:12,spid108,Unknown,* RESUTILS 05D50000 05D62FFF 00013000
04/25/2007 08:20:12,spid108,Unknown,* CLUSAPI 05D30000 05D41FFF 00012000
04/25/2007 08:20:12,spid108,Unknown,* OLEAUT32 77D00000 77D8BFFF 0008c000
04/25/2007 08:20:12,spid108,Unknown,* WSOCK32 71BB0000 71BB8FFF 00009000
04/25/2007 08:20:12,spid108,Unknown,* VERSION 77B90000 77B97FFF 00008000
04/25/2007 08:20:12,spid108,Unknown,* MTXCLU 05D10000 05D28FFF 00019000
04/25/2007 08:20:12,spid108,Unknown,* msvcp60 780C0000 78120FFF 00061000
04/25/2007 08:20:12,spid108,Unknown,* MSDTCPRX 05C90000 05D07FFF 00078000
04/25/2007 08:20:12,spid108,Unknown,* XOLEHLP 05C80000 05C85FFF 00006000
04/25/2007 08:20:12,spid108,Unknown,* COMRES 77010000 770D5FFF 000c6000
04/25/2007 08:20:12,spid108,Unknown,* schannel 76750000 76776FFF 00027000
04/25/2007 08:20:12,spid108,Unknown,* cryptdll 766E0000 766EBFFF 0000c000
04/25/2007 08:20:12,spid108,Unknown,* kerberos 05BC0000 05C17FFF 00058000
04/25/2007 08:20:12,spid108,Unknown,* iphlpapi 76CF0000 76D09FFF 0001a000
04/25/2007 08:20:12,spid108,Unknown,* msv1_0 76C90000 76CB6FFF 00027000
04/25/2007 08:20:12,spid108,Unknown,* MSCOREE 05950000 05994FFF 00045000
04/25/2007 08:20:12,spid108,Unknown,* AUTHZ 76C40000 76C53FFF 00014000
04/25/2007 08:20:12,spid108,Unknown,* rsaenh 04E90000 04EBEFFF 0002f000
04/25/2007 08:20:12,spid108,Unknown,* WLDAP32 76F10000 76F3DFFF 0002e000
04/25/2007 08:20:12,spid108,Unknown,* SAMLIB 5CCF0000 5CCFEFFF 0000f000
04/25/2007 08:20:12,spid108,Unknown,* ole32 77670000 777A3FFF 00134000
04/25/2007 08:20:12,spid108,Unknown,* NTMARTA 77E00000 77E21FFF 00022000
04/25/2007 08:20:12,spid108,Unknown,* SQLOS 344D0000 344D4FFF 00005000
04/25/2007 08:20:12,spid108,Unknown,* sqlevn70 4F610000 4F7A3FFF 00194000
04/25/2007 08:20:12,spid108,Unknown,* instapi 48060000 48069FFF 0000a000
04/25/2007 08:20:12,spid108,Unknown,* psapi 76B70000 76B7AFFF 0000b000
04/25/2007 08:20:12,spid108,Unknown,* comctl32 77420000 77522FFF 00103000
04/25/2007 08:20:12,spid108,Unknown,* SHLWAPI 77DA0000 77DF1FFF 00052000
04/25/2007 08:20:12,spid108,Unknown,* SHELL32 7C8D0000 7D0D2FFF 00803000
04/25/2007 08:20:12,spid108,Unknown,* NETAPI32 71C40000 71C97FFF 00058000
04/25/2007 08:20:12,spid108,Unknown,* opends60 333E0000 333E6FFF 00007000
04/25/2007 08:20:12,spid108,Unknown,* USERENV 76920000 769E3FFF 000c4000
04/25/2007 08:20:12,spid108,Unknown,* WS2HELP 71BF0000 71BF7FFF 00008000
04/25/2007 08:20:12,spid108,Unknown,* WS2_32 71C00000 71C16FFF 00017000
04/25/2007 08:20:12,spid108,Unknown,* MSWSOCK 71B20000 71B60FFF 00041000
04/25/2007 08:20:12,spid108,Unknown,* Secur32 76F50000 76F62FFF 00013000
04/25/2007 08:20:12,spid108,Unknown,* MSASN1 76190000 761A1FFF 00012000
04/25/2007 08:20:12,spid108,Unknown,* CRYPT32 761B0000 76242FFF 00093000
04/25/2007 08:20:12,spid108,Unknown,* GDI32 77C00000 77C47FFF 00048000
04/25/2007 08:20:12,spid108,Unknown,* USER32 77380000 77411FFF 00092000
04/25/2007 08:20:12,spid108,Unknown,* RPCRT4 77C50000 77CEEFFF 0009f000
04/25/2007 08:20:12,spid108,Unknown,* ADVAPI32 77F50000 77FEBFFF 0009c000
04/25/2007 08:20:12,spid108,Unknown,* MSVCP80 7C420000 7C4A6FFF 00087000
04/25/2007 08:20:12,spid108,Unknown,* msvcrt 77BA0000 77BF9FFF 0005a000
04/25/2007 08:20:12,spid108,Unknown,* MSVCR80 78130000 781CAFFF 0009b000
04/25/2007 08:20:12,spid108,Unknown,* kernel32 77E40000 77F41FFF 00102000
04/25/2007 08:20:12,spid108,Unknown,* ntdll 7C800000 7C8BFFFF 000c0000
04/25/2007 08:20:12,spid108,Unknown,* sqlservr 01000000 02BCEFFF 01bcf000
04/25/2007 08:20:12,spid108,Unknown,* MODULE BASE END SIZE
04/25/2007 08:20:12,spid108,Unknown,*
04/25/2007 08:20:12,spid108,Unknown,*
04/25/2007 08:20:12,spid108,Unknown,* Access Violation occurred reading address 00000000
04/25/2007 08:20:12,spid108,Unknown,* Exception Code = c0000005 EXCEPTION_ACCESS_VIOLATION
04/25/2007 08:20:12,spid108,Unknown,* Exception Address = 0179438B Module(sqlservr+0079438B)
04/25/2007 08:20:12,spid108,Unknown,*
04/25/2007 08:20:12,spid108,Unknown,*
04/25/2007 08:20:12,spid108,Unknown,* 04/25/07 08:20:12 spid 108
04/25/2007 08:20:12,spid108,Unknown,* BEGIN STACK DUMP:
04/25/2007 08:20:12,spid108,Unknown,*
04/25/2007 08:20:12,spid108,Unknown,* *******************************************************************************
04/25/2007 08:20:12,spid108,Unknown,SqlDumpExceptionHandler: Process 108 generated fatal exception c0000005 EXCEPTION_ACCESS_VIOLATION. SQL Server is terminating this process.
04/25/2007 08:20:12,spid108,Unknown,***Stack Dump being sent to D:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLLOGSQLDump0007.txt
04/25/2007 08:20:12,spid108,Unknown,Using 'dbghelp.dll' version '4.0.5'
04/25/2007 08:20:12,spid60,Unknown,An error occurred in the Service Broker internal activator while trying to scan the user queue '(null)' for its status. Error: 2905<c/> State: 1.
04/25/2007 08:20:12,spid60,Unknown,External dump process return code 0x20000001.<nl/>External dump process returned no errors.
04/25/2007 08:20:10,spid60,Unknown,Stack Signature for the dump is 0x1229B5AA
04/25/2007 08:20:10,spid60,Unknown,78132A36 Module(MSVCR80+00002A36)
04/25/2007 08:20:10,spid60,Unknown,781329AA Module(MSVCR80+000029AA)
04/25/2007 08:20:10,spid60,Unknown,01447720 Module(sqlservr+00447720)
04/25/2007 08:20:10,spid60,Unknown,0144789A Module(sqlservr+0044789A)
04/25/2007 08:20:10,spid60,Unknown,0144859B Module(sqlservr+0044859B)
04/25/2007 08:20:10,spid60,Unknown,01447562 Module(sqlservr+00447562)
04/25/2007 08:20:10,spid60,Unknown,01006DAB Module(sqlservr+00006DAB)
04/25/2007 08:20:10,spid60,Unknown,01006BBC Module(sqlservr+00006BBC)
04/25/2007 08:20:10,spid60,Unknown,01006A96 Module(sqlservr+00006A96)
04/25/2007 08:20:10,spid60,Unknown,0112F65C Module(sqlservr+0012F65C)
04/25/2007 08:20:10,spid60,Unknown,0112F70F Module(sqlservr+0012F70F)
04/25/2007 08:20:10,spid60,Unknown,0112CB04 Module(sqlservr+0012CB04)
04/25/2007 08:20:10,spid60,Unknown,0112D1D1 Module(sqlservr+0012D1D1)
04/25/2007 08:20:10,spid60,Unknown,0112EA61 Module(sqlservr+0012EA61)
04/25/2007 08:20:10,spid60,Unknown,0108A5CB Module(sqlservr+0008A5CB)
04/25/2007 08:20:10,spid60,Unknown,0108A56B Module(sqlservr+0008A56B)
04/25/2007 08:20:10,spid60,Unknown,01060A5A Module(sqlservr+00060A5A)
04/25/2007 08:20:10,spid60,Unknown,01476CB2 Module(sqlservr+00476CB2)
04/25/2007 08:20:10,spid60,Unknown,01476FD3 Module(sqlservr+00476FD3)
04/25/2007 08:20:10,spid60,Unknown,017FA720 Module(sqlservr+007FA720)
04/25/2007 08:20:10,spid60,Unknown,017FAADC Module(sqlservr+007FAADC)
04/25/2007 08:20:10,spid60,Unknown,01796B1B Module(sqlservr+00796B1B)
04/25/2007 08:20:10,spid60,Unknown,01793310 Module(sqlservr+00793310)
04/25/2007 08:20:10,spid60,Unknown,0179438B Module(sqlservr+0079438B)
04/25/2007 08:20:10,spid60,Unknown,* Short Stack Dump
04/25/2007 08:20:10,spid60,Unknown,* -------------------------------------------------------------------------------
04/25/2007 08:20:10,spid60,Unknown,* *******************************************************************************
04/25/2007 08:20:10,spid60,Unknown,* SegSs: 00000023:
04/25/2007 08:20:10,spid60,Unknown,* Esp: 1189E584: 11895387 80C87378 80C872F0 00000000 03E90001 00087C2D
04/25/2007 08:20:10,spid60,Unknown,* EFlags: 00010202: 00610067 00650074 0049003B 0076006E 006C0061 00640069
04/25/2007 08:20:10,spid60,Unknown,* SegCs: 0000001B:
04/25/2007 08:20:10,spid60,Unknown,* Ebp: 1189F67C: 1189F788 01793310 11895373 80C872F0 7093AB12 801E8B38
04/25/2007 08:20:10,spid60,Unknown,* Eip: 0179438B: 828B118B 000000E0 C085D0FF 00B9850F 9D890000 FFFFEF8C
04/25/2007 08:20:10,spid60,Unknown,* Edx: 00000E38:
04/25/2007 08:20:10,spid60,Unknown,* Ecx: 00000000:
04/25/2007 08:20:10,spid60,Unknown,* Ebx: 00000000:
04/25/2007 08:20:10,spid60,Unknown,* Eax: 5ADE8598: 00000000 00000000 5ADE85B0 00000000 00000000 00000000
04/25/2007 08:20:10,spid60,Unknown,* Esi: 00000000:
04/25/2007 08:20:10,spid60,Unknown,* Edi: 80C872F0: 7093AB12 80C87FF0 00000007 B8A20008 7093AB15 00000000
04/25/2007 08:20:10,spid60,Unknown,*
04/25/2007 08:20:10,spid60,Unknown,* dbghelp 14200000 14312FFF 00113000
04/25/2007 08:20:10,spid60,Unknown,* sqlevn70 76780000 76913FFF 00194000
04/25/2007 08:20:10,spid60,Unknown,* sqlevn70 764A0000 76633FFF 00194000
04/25/2007 08:20:10,spid60,Unknown,* sqlevn70 76300000 76493FFF 00194000
04/25/2007 08:20:10,spid60,Unknown,* sqlevn70 341D0000 343AFFFF 001e0000
04/25/2007 08:20:10,spid60,Unknown,* sqlevn70 33590000 33764FFF 001d5000
04/25/2007 08:20:10,spid60,Unknown,* sqlevn70 333F0000 33583FFF 00194000
04/25/2007 08:20:10,spid60,Unknown,* sqlevn70 14490000 1467AFFF 001eb000
04/25/2007 08:20:10,spid60,Unknown,* sqlevn70 13D10000 13EFBFFF 001ec000
04/25/2007 08:20:10,spid60,Unknown,* OLEDB32R 13770000 13780FFF 00011000
04/25/2007 08:20:10,spid60,Unknown,* MSDART 133D0000 133E9FFF 0001a000
04/25/2007 08:20:10,spid60,Unknown,* oledb32 13350000 133C8FFF 00079000
04/25/2007 08:20:10,spid60,Unknown,* msxml3 11BD0000 11CE1FFF 00112000
04/25/2007 08:20:10,spid60,Unknown,* msxmlsql 11AF0000 11BC5FFF 000d6000
04/25/2007 08:20:10,spid60,Unknown,* System.Xml 10FA0000 11193FFF 001f4000
04/25/2007 08:20:10,spid60,Unknown,* System.Security 10F20000 10F61FFF 00042000
04/25/2007 08:20:10,spid60,Unknown,* System 10C10000 10EF3FFF 002e4000
04/25/2007 08:20:10,spid60,Unknown,* System.Security.ni 10A90000 10B45FFF 000b6000
04/25/2007 08:20:10,spid60,Unknown,* System.Transactions 0FAD0000 0FB12FFF 00043000
04/25/2007 08:20:10,spid60,Unknown,* System.ni 7A440000 7ABFDFFF 007be000
04/25/2007 08:20:10,spid60,Unknown,* System.Data 102D0000 10596FFF 002c7000
04/25/2007 08:20:10,spid60,Unknown,* mscorjit 0F910000 0F962FFF 00053000
04/25/2007 08:20:10,spid60,Unknown,* SqlAccess 0F8A0000 0F8F5FFF 00056000
04/25/2007 08:20:10,spid60,Unknown,* SensApi 0F880000 0F884FFF 00005000
04/25/2007 08:20:10,spid60,Unknown,* cryptnet 0F680000 0F691FFF 00012000
04/25/2007 08:20:10,spid60,Unknown,* SOFTPUB 0F670000 0F674FFF 00005000
04/25/2007 08:20:10,spid60,Unknown,* mscorsec 0F640000 0F652FFF 00013000
04/25/2007 08:20:10,spid60,Unknown,* mscorlib.ni 0EAC0000 0F5A7FFF 00ae8000
04/25/2007 08:20:10,spid60,Unknown,* mscorwks 080E0000 08640FFF 00561000
04/25/2007 08:20:10,spid60,Unknown,* xplog70 07CA0000 07CA2FFF 00003000
04/25/2007 08:20:10,spid60,Unknown,* xplog70 07C80000 07C8BFFF 0000c000
04/25/2007 08:20:10,spid60,Unknown,* xpstar90 07C50000 07C75FFF 00026000
04/25/2007 08:20:10,spid60,Unknown,* odbcint 07C30000 07C46FFF 00017000
04/25/2007 08:20:10,spid60,Unknown,* ATL80 7C630000 7C64AFFF 0001b000
04/25/2007 08:20:10,spid60,Unknown,* BatchParser90 07A40000 07A5EFFF 0001f000
04/25/2007 08:20:10,spid60,Unknown,* ODBC32 07A00000 07A3CFFF 0003d000
04/25/2007 08:20:10,spid60,Unknown,* SQLSCM90 079E0000 079E8FFF 00009000
04/25/2007 08:20:10,spid60,Unknown,* xpstar90 07980000 079C7FFF 00048000
04/25/2007 08:20:10,spid60,Unknown,* xpsqlbot 07960000 07965FFF 00006000
04/25/2007 08:20:10,spid60,Unknown,* msftepxy 07490000 074A4FFF 00015000
04/25/2007 08:20:10,spid60,Unknown,* SQLNCLIR 007A0000 007D2FFF 00033000
04/25/2007 08:20:10,spid60,Unknown,* comdlg32 762B0000 762F9FFF 0004a000
04/25/2007 08:20:10,spid60,Unknown,* COMCTL32 77530000 775C6FFF 00097000
04/25/2007 08:20:10,spid60,Unknown,* sqlncli 337A0000 339C1FFF 00222000
04/25/2007 08:20:10,spid60,Unknown,* CLBCatQ 777B0000 77832FFF 00083000
04/25/2007 08:20:10,spid60,Unknown,* xpsp2res 10000000 102C4FFF 002c5000
04/25/2007 08:20:10,spid60,Unknown,* ntdsapi 766F0000 76704FFF 00015000
04/25/2007 08:20:10,spid60,Unknown,* wshtcpip 070B0000 070B7FFF 00008000
04/25/2007 08:20:10,spid60,Unknown,* hnetcfg 071F0000 07248FFF 00059000
04/25/2007 08:20:10,spid60,Unknown,* dssenh 070C0000 070E3FFF 00024000
04/25/2007 08:20:10,spid60,Unknown,* imagehlp 76C10000 76C38FFF 00029000
04/25/2007 08:20:10,spid60,Unknown,* WINTRUST 76BB0000 76BDAFFF 0002b000
04/25/2007 08:20:10,spid60,Unknown,* dbghelp 06C10000 06D22FFF 00113000
04/25/2007 08:20:10,spid60,Unknown,* msfte 069B0000 06C08FFF 00259000
04/25/2007 08:20:10,spid60,Unknown,* security 06190000 06193FFF 00004000
04/25/2007 08:20:10,spid60,Unknown,* rasadhlp 76F80000 76F84FFF 00005000
04/25/2007 08:20:10,spid60,Unknown,* winrnr 76F70000 76F76FFF 00007000
04/25/2007 08:20:10,spid60,Unknown,* DNSAPI 76ED0000 76EF8FFF 00029000
04/25/2007 08:20:10,spid60,Unknown,* RESUTILS 05D50000 05D62FFF 00013000
04/25/2007 08:20:10,spid60,Unknown,* CLUSAPI 05D30000 05D41FFF 00012000
04/25/2007 08:20:10,spid60,Unknown,* OLEAUT32 77D00000 77D8BFFF 0008c000
04/25/2007 08:20:10,spid60,Unknown,* WSOCK32 71BB0000 71BB8FFF 00009000
04/25/2007 08:20:10,spid60,Unknown,* VERSION 77B90000 77B97FFF 00008000
04/25/2007 08:20:10,spid60,Unknown,* MTXCLU 05D10000 05D28FFF 00019000
04/25/2007 08:20:10,spid60,Unknown,* msvcp60 780C0000 78120FFF 00061000
04/25/2007 08:20:10,spid60,Unknown,* MSDTCPRX 05C90000 05D07FFF 00078000
04/25/2007 08:20:10,spid60,Unknown,* XOLEHLP 05C80000 05C85FFF 00006000
04/25/2007 08:20:10,spid60,Unknown,* COMRES 77010000 770D5FFF 000c6000
04/25/2007 08:20:10,spid60,Unknown,* schannel 76750000 76776FFF 00027000
04/25/2007 08:20:10,spid60,Unknown,* cryptdll 766E0000 766EBFFF 0000c000
04/25/2007 08:20:10,spid60,Unknown,* kerberos 05BC0000 05C17FFF 00058000
04/25/2007 08:20:10,spid60,Unknown,* iphlpapi 76CF0000 76D09FFF 0001a000
04/25/2007 08:20:10,spid60,Unknown,* msv1_0 76C90000 76CB6FFF 00027000
04/25/2007 08:20:10,spid60,Unknown,* MSCOREE 05950000 05994FFF 00045000
04/25/2007 08:20:10,spid60,Unknown,* AUTHZ 76C40000 76C53FFF 00014000
04/25/2007 08:20:10,spid60,Unknown,* rsaenh 04E90000 04EBEFFF 0002f000
04/25/2007 08:20:10,spid60,Unknown,* WLDAP32 76F10000 76F3DFFF 0002e000
04/25/2007 08:20:10,spid60,Unknown,* SAMLIB 5CCF0000 5CCFEFFF 0000f000
04/25/2007 08:20:10,spid60,Unknown,* ole32 77670000 777A3FFF 00134000
04/25/2007 08:20:10,spid60,Unknown,* NTMARTA 77E00000 77E21FFF 00022000
04/25/2007 08:20:10,spid60,Unknown,* SQLOS 344D0000 344D4FFF 00005000
04/25/2007 08:20:10,spid60,Unknown,* sqlevn70 4F610000 4F7A3FFF 00194000
04/25/2007 08:20:10,spid60,Unknown,* instapi 48060000 48069FFF 0000a000
04/25/2007 08:20:10,spid60,Unknown,* psapi 76B70000 76B7AFFF 0000b000
04/25/2007 08:20:10,spid60,Unknown,* comctl32 77420000 77522FFF 00103000
04/25/2007 08:20:10,spid60,Unknown,* SHLWAPI 77DA0000 77DF1FFF 00052000
04/25/2007 08:20:10,spid60,Unknown,* SHELL32 7C8D0000 7D0D2FFF 00803000
04/25/2007 08:20:10,spid60,Unknown,* NETAPI32 71C40000 71C97FFF 00058000
04/25/2007 08:20:10,spid60,Unknown,* opends60 333E0000 333E6FFF 00007000
04/25/2007 08:20:10,spid60,Unknown,* USERENV 76920000 769E3FFF 000c4000
04/25/2007 08:20:10,spid60,Unknown,* WS2HELP 71BF0000 71BF7FFF 00008000
04/25/2007 08:20:10,spid60,Unknown,* WS2_32 71C00000 71C16FFF 00017000
04/25/2007 08:20:10,spid60,Unknown,* MSWSOCK 71B20000 71B60FFF 00041000
04/25/2007 08:20:10,spid60,Unknown,* Secur32 76F50000 76F62FFF 00013000
04/25/2007 08:20:10,spid60,Unknown,* MSASN1 76190000 761A1FFF 00012000
04/25/2007 08:20:10,spid60,Unknown,* CRYPT32 761B0000 76242FFF 00093000
04/25/2007 08:20:10,spid60,Unknown,* GDI32 77C00000 77C47FFF 00048000
04/25/2007 08:20:10,spid60,Unknown,* USER32 77380000 77411FFF 00092000
04/25/2007 08:20:10,spid60,Unknown,* RPCRT4 77C50000 77CEEFFF 0009f000
04/25/2007 08:20:10,spid60,Unknown,* ADVAPI32 77F50000 77FEBFFF 0009c000
04/25/2007 08:20:10,spid60,Unknown,* MSVCP80 7C420000 7C4A6FFF 00087000
04/25/2007 08:20:10,spid60,Unknown,* msvcrt 77BA0000 77BF9FFF 0005a000
04/25/2007 08:20:10,spid60,Unknown,* MSVCR80 78130000 781CAFFF 0009b000
04/25/2007 08:20:10,spid60,Unknown,* kernel32 77E40000 77F41FFF 00102000
04/25/2007 08:20:10,spid60,Unknown,* ntdll 7C800000 7C8BFFFF 000c0000
04/25/2007 08:20:10,spid60,Unknown,* sqlservr 01000000 02BCEFFF 01bcf000
04/25/2007 08:20:10,spid60,Unknown,* MODULE BASE END SIZE
04/25/2007 08:20:10,spid60,Unknown,*
04/25/2007 08:20:10,spid60,Unknown,*
04/25/2007 08:20:10,spid60,Unknown,* Access Violation occurred reading address 00000000
04/25/2007 08:20:10,spid60,Unknown,* Exception Code = c0000005 EXCEPTION_ACCESS_VIOLATION
04/25/2007 08:20:10,spid60,Unknown,* Exception Address = 0179438B Module(sqlservr+0079438B)
04/25/2007 08:20:10,spid60,Unknown,*
04/25/2007 08:20:10,spid60,Unknown,*
04/25/2007 08:20:10,spid60,Unknown,* 04/25/07 08:20:10 spid 60
04/25/2007 08:20:10,spid60,Unknown,* BEGIN STACK DUMP:
04/25/2007 08:20:10,spid60,Unknown,*
04/25/2007 08:20:10,spid60,Unknown,* *******************************************************************************
04/25/2007 08:20:10,spid60,Unknown,SqlDumpExceptionHandler: Process 60 generated fatal exception c0000005 EXCEPTION_ACCESS_VIOLATION. SQL Server is terminating this process.
04/25/2007 08:20:10,spid60,Unknown,***Stack Dump being sent to D:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLLOGSQLDump0006.txt
04/25/2007 08:20:10,spid60,Unknown,Using 'dbghelp.dll' version '4.0.5'

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Installation Error - 'NOLOCK'

Jun 27, 2007

I get the following error when installing SQL Server Express SP2 on Windows XP SP2 with all current updates. The only other thing installed is .NET 2.0. Does anyone know how to resolve the issue.

[Microsoft][SQL Native Client][SQL Server]Could not continue scan with NOLOCK due to data movement

Thanks,

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SQL2K/Log Reader Fails With Error 9003 The LSN Passed To Log Scan Is Invalid

Aug 8, 2007

Hi All,
We have transactional replication between two SQL Server 2000, SP4 and database is in simple recovery.
Occassionally Logreader agent fails with error 9003 (The LSN (164051:119090:22) passed to log scan in database 'ReportDB' is
invalid).
But in April 2007 this error has occurred multiple times. We have opened the case with PSS in April 2007 but till now there
is no concrete solution.

Error details in ErrorLog:
2007-04-24 16:49:09.79 spid59 Error: 9003, Severity: 20, State: 1
2007-04-24 16:49:09.79 spid59 The LSN (164051:119090:22) passed to log scan in database 'ReportDB' is invalid..
Error details in Log reader agent:
Repl Agent Status: 3
Publisher: {call sp_repldone ( 0x000280d30001d1320016, 0x000280d30001d1320016, 0, 0)}
Publisher: {call sp_replcmds (100, 0)}
Status: 0, code: 0, text: 'The process could not execute 'sp_replcmds' on 'BR14D135R17'.'.
The process could not execute 'sp_replcmds' on 'BR14D135R17'.
Repl Agent Status: 6
Status: 0, code: 9003, text: 'The LSN (164051:119090:22) passed to log scan in database 'ReportDB' is invalid.'.

From above error details it can be seen that sp_repldone is already called for LSN 164051:119090:22 (0x000280d30001d1320016)
which means it is distributed.
Since LSN is distributed, transaction log of publisher for that LSN can be truncated by checkpoint process. And afterward if
logreader issues sp_replcmds for that LSN, we will get 9003 error.
So, question is why Logreader is looking for LSN if that is already distributed.
When checked "DBCC Opentran", it also reflect oldest distributed LSN as 164051:119090:22.

We tried changing the recovery model to FULL but that has only delayed the occurrence.
Once we have noticed that LSN mentioned in Error 9003 was already backed up one day before. And we don't think replication latency to be more than 3 hrs
(maximum).

After PSS recommendation, we have applied the hotfix 2187 but error has occurred again after one month.
Other recommendation is to disable read cache of hardware controller to avoid stale read(that we are working on). Current
setting is 100% read and 0% Write.

Other Details:
SQL Server 2000 Enterprise Edition SP4 with Hotfix 2187
Window 2000 Advanced Server.
RAID 5 with array controller as HP Smart Array 641 Controller

Please let me know if you have faced such issue and have any idea on this problem.

Thanks,
Ramesh

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Index Seek, Index Scan, Table Scan

Oct 4, 2007

Hey,

what is the difference between Table Scan und Index Scan?

I find no difitions in the internet

Finchen

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What Is Table Scan, Index Scan And Index Seek??

Sep 21, 2007

Hi,
I want to know wht is a

TABLE SCAN
INDEX SCAN
INDEX SEEKand When they are used, Wht is the difference between all these.????

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Sep 20, 2006

Hi,

This is on Sybase but I'm guessing that the same situation would happen on SQL Server. (Please confirm if you know).

I'm looking at these new databases and I'm seeing code similar to this all over the place:

if not exists (select 1 from dbo.t1 where f1 = @p1)
begin
select @errno = @errno | 1
end

There's a unique clustered in dex on t1.f1.

The execution plan shows this for this statement:

FROM TABLE
dbo.t1
EXISTS TABLE : nested iteration.
Table Scan.
Forward scan.
Positioning at start of table.

It's not using my index!!!!!

It seems to be the case with EXISTS statements. Can anybody confirm?

I also hinted to use the index but it still didn't use it.

If the existence check really doesn't use the index, what's a good code alternative to this check?

I did this and it's working great but I wonder if there's a better alternative. I don't really like doing the SET ROWCOUNT 1 and then SET ROWCOUNT 0 thing. SELECT TOP 1 won't work on Sybase, :-(.

SET ROWCOUNT 1
SELECT @cnt = (SELECT 1 FROM dbo.t1 (index ix01)
WHERE f1 = @p1
)
SET ROWCOUNT 0

Appreciate your help.

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SQL 2012 :: Error (backup Failed To Complete The Command BACKUP LOG) In Event Viewer

Aug 23, 2013

On the SQL Server the Event Viewer shows the same messages and errors every evening between 22:05:00 and 22:08:00. The following information messages are shown for every database:

"I/O is frozen on database <database name>. No user action is required. However, if I/O is not resumed promptly, you could cancel the backup."

"I/O was resumed on database <database name>. No user action is required."

"Database backed up. Database: <database name>, creation date(time): 2003/04/08(09:13:36), pages dumped: 306, first LSN: 44:148:37, last LSN: 44:165:1, number of dump devices: 1, device information: (FILE=1, TYPE=VIRTUAL_DEVICE: {'{A79410F7-4AC5-47CE-9E9B-F91660F1072B}4'}). This is an informational message only. No user action is required."

After the 3 messages the following error message is shown for every database:

"BACKUP failed to complete the command BACKUP LOG <database name>. Check the backup application log for detailed messages."

I have added a Maintenance Plan but these jobs run after 02:00:00 at night.

Where can I find the command or setup which will backup all databases and log files at 22:00:00 in the evening?

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Backup Failed (Error 3041) While Try To Issue A BACKUP Statement In Local

Feb 9, 2004

Hi,

I use the Transact-SQL BACKUP statement in Visual Basic to backup my local MSSQL Database. It give me this error

Error 3041

BACKUP failed to complete the command BACKUP DATABASE [BCFPC] to BCFPCBKP

I already created a backup device called BCFPCBKP and it is backup to the disk.

I tried to run the same BACKUP statement in SQL Query Analyzer and it worked fine. I tried to run my VB application in another PC. It worked fine when i use this command remotely. Can anyone tell me what's the problem?

Thanks in advance

regards,
M.Y. Yap

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How Can I Trigger Full Backup On Tran Log Backup Error?

Aug 8, 2007

Hello,
I have MS SQL 2005 server with 300+ databases on it. The application is set up that way that it creates a new database as needed (dynamically). Do not ask me why - I hate this design... So, it can create 3-4 databases a day (random time).
I've scheduled full backup of all databases to run once at night, and it runs just fine. Besides that, I have scheduled tran logs backup of all databases to run every hour. This backup fails from time to time with the following error:

Executing the query "BACKUP LOG [survey_p0886464_test] TO DISK = N'D:\backups\log backups\survey_p0886464_test_backup_200708072300.trn' WITH NOFORMAT, NOINIT, NAME = N'survey_p0886464_test_backup_20070807230002', SKIP, REWIND, NOUNLOAD, STATS = 10
" failed with the following error: "BACKUP LOG cannot be performed because there is no current database backup.
BACKUP LOG is terminating abnormally.". Possible failure reasons: Problems with the query, "ResultSet" property not set correctly, parameters not set correctly, or connection not established correctly.

So, I think what happens is since my full backup of all databases are scheduled to run only once at night, and tran logs every hour, when new database is created during the day, there is no full backup for it, that is why tran logs backup fails. Becuase after the failure, if I run full backup again, then tran log runs just fine afterwards.

I am new to MS SQL Server, I am mostly working with Sybase IQ. Do you know if I can "trigger" full backup every time when new database created to avoid tran lof failure?

Or is it possible to schedule full backup to run if tran log backup fails?
Any advice will be much appreciated.

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NOLOCK Or Not To NOLOCK

Mar 9, 2005

I need some help to under stand when the right time is for NOLOCK. I work in a small dev group and NOLOCK seams to be a buzz word and others are throwing it in all over for no apparent reason.

I read the thing from http://www.sql-server-performance.com/ and I am sure that our web and SQL servers are about 100x over sized for the application. While are ASP.Net (VB) app may demonstrate some hesitation from time to time I am more inclined to blame poor VB.Net coding techniques before slow SQL. The point being the NOLOCK is being added to SELECTS that are not part of a transaction and were using the SQL data adapter to return datasets or single column values.

Also I am not even sure it’s being used correctly. The OLM has the example:
SELECT au_lname FROM authors WITH (NOLOCK)

However I am seeing it formatted like this:
SELECT au_lname FROM authors (NOLOCK)

I am by no mean an expert, I follow what I read in books or from examples from others. And I have never read in a book go crazy with NOLOCK because it’s the bomb!

Any thoughts? I am trying to learn as much as I can before I raise my hand and say this might be a bad idea.

Thanks

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Jan 29, 1999

Other than "dirty" reads, what are the cons of using NOLOCK throughout a query?

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Mar 7, 2001

Hi,
I have a job that runs 3 seperate DTS packages.

The first step imports a file and runs successfully.

The second step which is the 2nd DTS package is hanging in the execute mode until I manually stop the job. Apparently,We discovered a bulk insert that is blocking a select statement--both proccesses are within this second DTS package. I tried using the WITH (UNLOCK) on the tables but this DTS package is still failing.

Does anyone have any suggestion? It would be greatly appreciated.

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Mar 4, 2004

Hi guys,

I am a new user for DB2.

In DB2 V8, i have a table with some no of columns.

table test
col1
col2
col3
col4

Now i want to issue a query like this.

select col1 from test with(NOLOCK) where col1 = <some value>

when i am executing this query on that time i am getting a error message like this...

SQL0158N The number of columns specified for "MT.TEST" is not the
same as the number of columns in the result table. SQLSTATE=42811

Anyone can help me???

i tried to find out.

I did the same thing with SQL server 2000.
I am not facing any problem there.

Thanks & Regards,
Muthu

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Jun 6, 2006

Paul Randal,

There has been a discussion/debate going on this thread about the benefits and drawbacks of using the NOLOCK hint:
http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=67294

It occurred to me that you might know more about this than any of us, or at least be able to point us to a white paper or knowledge base article that explains the subject in more detail. Any light you can shed on the subject would be a big help.

CODO ERGO SUM

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Jan 8, 2008

is really helpful use "with (nolock)" sentence in selects??

100% useful?? disadvantages?

best regards

Joseph

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Jun 2, 1999

Hello,
Does anyone know if you place NOLOCK after a view in a select statement, if the effects trickle down to the tables in the view? Or does one have to add NOLOCK to each table within the view?

Thanks

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Jun 23, 2004

Hello !!

I'm using the sentence NOLOCK for selects, but I have many sentences, Is there any way to set a parameter in the DBMS, to use NOLOCK parameter by default ???? I mean, I don't like to lock any table for selects.

Is It possible ???? How to do It (step by step) ?

Thanks !!

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Nov 1, 2005

Hey guys,

I came across a SQL statement, thought up by a developer, in which two views were joined with the NOLOCK hint:
SELECT v1.xxx, v2.yyy
FROM dbo.vw_SomeView v1 WITH (NOLOCK)
INNER JOIN dbo.vw_SomeOtherView WITH (NOLOCK) ON v1.id = v2.id
The views are not created the NOLOCK hint. So my question is: has the NOLOCK hint any effect here?

I've looked in the BOL and searched on the net but can't find anything on this particular topic.

Lex

PS. Personally I don't like to use views in JOINs. I've seen too many cases in which tables are joined twice just because they are part of both views. Further more I don't like the "random" use of NOLOCK because most people don't seem to understand the implications of it. But this is besides the point of my question ;)

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Apr 5, 2006

I'm running a heavy SELECT query using WITH (NOLOCK). This still causes other processes trying to INSERT in one of the tables to get blocked.
I thought the locking hint would prevent from blocking other processes?

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What will happen if I'm running a query with the NOLOCK hint but the SQL Server has run out of resources?

Thanks!

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May 12, 2008

Hi,

I was sreading about NOLOCK that it could prevent deadlocks but could return data which is not committed yet.
1) Should we use NOLOCK with select statements
2) If the transaction isolation level is set appropriately (e.g. Serializable)in the component (for e.g COM+ component) but NOLOCK is specified in the select then would it return uncommitted data. I mean if the transaction is controlled at hihger level then what will be the Pros and Cons of using NOLOCK.

Thanks

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Aug 12, 2013

What is the purpose of using WITH(NOLOCK)?

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Dec 28, 2007

Hi!

select * from rubberstock_tbl_shoppingcarttemp
It dosent take datas from the table but

select * from rubberstock_tbl_shoppingcarttemp (nolock)
This querey takes the data from the table

what can i do to retrieve records through first query.I dont know what
is happening please explain and also dont know about nolock

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Feb 25, 2008

When the NOLOCK hint is included in a SELECT statement, no locks are taken when data is read. This gives a Dirty Read in a result set.
The data retrieved in the select statement may not be correct since some other process might have updated the data while it was taken in the select statement.

Now, Can I know what is the use of NOLOCK? In which way we can make efficient use of NOLOCK ???

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Mar 11, 2008

Hi, I get an error when select * from a table with nolock....please help.

Cannot specify an index or locking hint for a remote data source

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Mar 30, 2008

Hi,

I have never used NOLOCK, or ROWLOCK, or anything of that sort. It's something I thought was over my head when I first encountered it and as I am gaining a better grip on SQL I have decided I want to try and tackle it. Also, because I think its causing me some problems :)

I recently implemented a new query into my application.

The query below gets the COUNT(*) of certain tables. Some of these tables are tall (5 million plus rows)

The counts returned are not absolutely critical information, and we are not joining or doing any other transactions based on this data. I believe running these counts on these pretty active tables (selects,inserts) are possibly causing slowdowns ?

Would using NOLOCK be an appropriate situation for something like this ? I am looking for a performance increase hopefully, and hoping there isnt much of a downside? I'm also not sure what type of reliability to expect from NOLOCK.

Any help much appreciated !!

Thanks once again
mike123

create PROCEDURE [dbo].[select_UserStats_Admin_TEST]
(
@userID int
)
AS SET NOCOUNT ON

DECLARE @Mail_Sent INT, @Mail_Received INT, @Comments_Sent INT, @Comments_Received INT,

@friendsListCount INT

SELECT @Mail_Sent = count(*) FROM tblMessage WHERE messageFrom = @userID
SELECT @Mail_Received = count(*) FROM tblMessage WHERE messageTo = @userID

SELECT @Comments_Sent = count(*) FROM tblComment WHERE CommentFromID = @userID
SELECT @Comments_Received = count(*) FROM tblComment WHERE CommentTo = @userID

SELECT @friendsListCount = count(*) FROM tblFriends WHERE userID = @userID

SELECT @Mail_Sent as Mail_Sent, @Mail_Received as Mail_Received, @Comments_Sent as Comments_Sent,
@Comments_Received as Comments_Received, @friendsListCount as friendsListCount

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Feb 17, 2006

Hi,Is there a way to catch every select comming to sql and change it toselect with nolock?or how to make database READ UNCOMMITTED permanent?any ideas?Richard

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Jul 20, 2005

I am getting lot of deadlocks in my application. As it is very complexti avoid deadlocks at this stage of application we have done few stepsto lessen the impact.We have added retries after deadlock is capturted.We have added select * from TABLE with (nolock) wherever possible.But interestingly second step is not working. I have few simple selectstatements where i am using nolock criteria still I am gettingdeadlock victim error. Any idead why it happening. I thought as soonas I put nolock in the query it will ignore all the locks.My sp isCREATE procedure sp_Check_denomination@supply_till_idint,@product_codechar(4),@iso_currency_codechar(3),@denominationmoneyasdeclare @product_id numeric(5)select @product_id = product_id from product with (nolock) whereproduct_code = @product_codeif exists (select *from transaction_inventory TI with (nolock),product_ccy_denom PCD with (nolock)where TI.supply_till_id = @supply_till_idand TI.product_id = @product_idand TI.iso_currency_code= @iso_currency_codeand TI.denomination = @denominationand TI.product_id = PCD.product_idand TI.iso_currency_code = PCD.iso_currency_codeand TI.denomination = PCD.denominationand PCD.product_id=@product_idand PCD.denomination = @denominationand PCD.iso_currency_code=@iso_currency_codeand PCD.tradeable = 1)beginreturn(1)endelsebeginreturn(0)endGO

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When To Use The NOLOCK Hint.

Jul 20, 2005

Background:I am currently working on a mission critical web based applicationthat is accessed 24 hours a day by users from just about every timezone. We use MS SQL Server as our database and we have lots ofproblems with time-outs. We used to have lots of problems with locksuntil my management decided that we would use the WITH (NOLOCK) hinton EVERY select statement and WITH (ROWLOCK) on EVERY updatestatement. I have argued since the beginning that the NOLOCK hintshould be the exception and not the rule. Meanwhile we continue tohave problems related to time-outs.Problem:I'm the one that they call when there are time-out errors.I am a programmer first and a DBA when I have to be. I'd really liketo hear from some of you who are the opposite. I realize that thereare many factors that contribute to slow response from a databaseserver (indexes, RAM, disk speed, etc.), but what I really need tohear from an expert is whether or not using NOLOCK on **EVERY** queryin a 30GB database that has 344 tables is a bad idea.Thanks in advance,Stephen McMahonJoin Bytes!

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